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Tapered bearing as zero point

Madis Reivik

Hot Rolled
Joined
Jan 23, 2011
Location
Estonia
Hello all !

I have a simple fixture to make and I had an idea
Why not use tapered bearings instead of reamed hole / pin ?

Has anybody done that ? Bearings are cheap and accurate, much cheaper than true zero point holder system.

I was thinking about putting 4 bearings in the jig corners and put the M10 bolt tru them.
 

dandrummerman21

Stainless
Joined
Feb 5, 2008
Location
MI, USA
Hello all !

I have a simple fixture to make and I had an idea
Why not use tapered bearings instead of reamed hole / pin ?

Has anybody done that ? Bearings are cheap and accurate, much cheaper than true zero point holder system.

I was thinking about putting 4 bearings in the jig corners and put the M10 bolt tru them.

I would say "why?" but maybe I don't understand what you mean.
 

angelw

Diamond
Joined
Sep 10, 2010
Location
Victoria Australia
Hello all !

I have a simple fixture to make and I had an idea
Why not use tapered bearings instead of reamed hole / pin ?

Has anybody done that ? Bearings are cheap and accurate, much cheaper than true zero point holder system.

I was thinking about putting 4 bearings in the jig corners and put the M10 bolt tru them.

I think you would run the risk of Brinelling the Cups in a static bearing configuration. A common method used to locate a pallet in a multi pallet change machine is via a solid cone and cup arrangement; that would be preferable to Taper Roller bearings.

Regards,

Bill
 

angelw

Diamond
Joined
Sep 10, 2010
Location
Victoria Australia
Hello all !

I have a simple fixture to make and I had an idea
Why not use tapered bearings instead of reamed hole / pin ?

Has anybody done that ? Bearings are cheap and accurate, much cheaper than true zero point holder system.

I was thinking about putting 4 bearings in the jig corners and put the M10 bolt tru them.

I think you would run the risk of Brinelling the Cups the cups in a static configuration. A common method used to locate a pallet in a multi pallet change machine is via a solid cone and cup arrangement. That would be preferable to Taper Roller bearings, but they would have to be accurately made to ensure the height at each corner was spot on. Measured as an assembly then ground to height perhaps.

Regards,

Bill
 

Madis Reivik

Hot Rolled
Joined
Jan 23, 2011
Location
Estonia
I think you would run the risk of Brinelling the Cups the cups in a static configuration. A common method used to locate a pallet in a multi pallet change machine is via a solid cone and cup arrangement. That would be preferable to Taper Roller bearings, but they would have to be accurately made to ensure the height at each corner was spot on. Measured as an assembly then ground to height perhaps.

Regards,

Bill

Yes, Brinelling might be a problem. But its mostly light aluminium cutting (front panels) so the cutting force is very low.

I will fix the inner part on the table along with the ball-cage and outer part will be on the fixture.
And I will use 4 of these, fixing bolt M8 will go trough the bearing.

One bearing costs about 3-4 euros, so its worth a try. Also, as the ball(or roll)cage rotates between fixture changes (air blast) then it maybe wears evenly.

I let you folks know, I think the fixture is in operation at the end of this week.
 

DDoug

Diamond
Joined
Oct 18, 2005
Location
NW Pa
Hello all !

I have a simple fixture to make and I had an idea
Why not use tapered bearings instead of reamed hole / pin ?

Has anybody done that ? Bearings are cheap and accurate, much cheaper than true zero point holder system.

I was thinking about putting 4 bearings in the jig corners and put the M10 bolt tru them.

Generally, I use only (2) locating points, first one is a dowel, second is a diamond pin.

Using (4) is just asking for fighting between locators.
 

Garwood

Diamond
Joined
Oct 10, 2009
Location
Oregon
Generally, I use only (2) locating points, first one is a dowel, second is a diamond pin.

Using (4) is just asking for fighting between locators.

Pallet changing HMC's often use four as AngelW described. I expect the accuracy is probably a magnitude better than wheel bearings in aluminum though.
 

Vancbiker

Diamond
Joined
Jan 5, 2014
Location
Vancouver, WA. USA
Yes, Brinelling might be a problem. But its mostly light aluminium cutting (front panels) so the cutting force is very low.

I will fix the inner part on the table along with the ball-cage and outer part will be on the fixture.
And I will use 4 of these, fixing bolt M8 will go trough the bearing.

One bearing costs about 3-4 euros, so its worth a try. Also, as the ball(or roll)cage rotates between fixture changes (air blast) then it maybe wears evenly.

I let you folks know, I think the fixture is in operation at the end of this week.

IMO, too many places for a chip to get caught up in.
 








 
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